<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片主体区域 -->
    <el-card>
      <!-- 警告 -->
      <el-alert :closable="false" title="注意:只允许第三级分类设置相关参数" type="warning" show-icon></el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类:</span>
          <el-cascader
            v-model="selectedCatekeys"
            :props="cateProps"
            :options="Productclassificationlist"
            expand-trigger="hover"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- tbas标签也页 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数的面板 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="parameterVisible = true"
          >添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
               <template slot-scope="scope">
                <!-- 循环tag标签 -->
                <el-tag v-for="(item,i) in scope.row.attr_vals"
                 :key="i" closable @close="handleClose(i,scope.row)">
                  {{item}}
                </el-tag>
                <!-- 输入文本框 -->
                <el-input
        class="input-new-tag"
        v-if="scope.row.inputVisible"
        v-model="scope.row.inputValue"
        ref="saveTagInput"
        size="small"
        @keyup.enter.native="handleInputConfirm(scope.row)"
        @blur="handleInputConfirm(scope.row)">
</el-input>
<!-- 按钮 -->
<el-button class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
</template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="Changeparameters(scope.row.attr_id)">修改</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="Deleteparameter(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性的面板 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="parameterVisible = true"
          >添加属性</el-button>
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
               <template slot-scope="scope">
                     <!-- 循环tag标签 -->
                <el-tag v-for="(item,i) in scope.row.attr_vals"
                 :key="i" closable @close="handleClose(i,scope.row)">
                  {{item}}
                </el-tag>
                <!-- 输入文本框 -->
                <el-input
                    class="input-new-tag"
                    v-if="scope.row.inputVisible"
                    v-model="scope.row.inputValue"
                    ref="saveTagInput"
                    size="small"
                    @keyup.enter.native="handleInputConfirm(scope.row)"
                    @blur="handleInputConfirm(scope.row)">
            </el-input>
            <!-- 按钮 -->
            <el-button class="button-new-tag" size="small"
            @click="showInput(scope.row)">+ New Tag
            </el-button>
            </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="Changeparameters(scope.row.attr_id)">修改</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="Deleteparameter(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!--添加参数的对话框 -->
    <el-dialog :title="'添加' + titleText" :visible.sync="parameterVisible" width="50%" @close="paramClosed">
      <el-form :model="paramForm" :rules="paramRules" ref="paramRef" label-width="80px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="paramForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="parameterVisible = false">取 消</el-button>
        <el-button type="primary" @click="addparams">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改参数的对话框 -->

     <el-dialog :title="'修改' + titleText" :visible.sync="ChangeparameterVisible" width="50%" @close="ChangeFormClosed">
      <el-form :model="ChangeForm" :rules="ChangeFormRules" ref="ChangeFormRef" label-width="80px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="ChangeForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="ChangeparameterVisible = false">取 消</el-button>
        <el-button type="primary" @click="Confirmmodification">确 定</el-button>
      </span>
    </el-dialog>
    

  </div>
</template>


<script>
export default {
  data() {
    return {
      // 所有的商品分类列表
      Productclassificationlist: [],
      // 级联选择框的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 级联选择框双向绑定的数组
      selectedCatekeys: [],
      // 被激活的标签页名称
      activeName: 'many',
      // 动态参数
      manyTableData: [],
      // 静态属性
      onlyTableData: [],
      // 添加动态静态对话框
      parameterVisible: false,
      // 添加参数的表单数据对象
      paramForm: {
        attr_name: ''
      },
      // 添加表单验证规则的对象
      paramRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
          {
            min: 2,
            max: 10,
            message: '名称长度2到10个字符之间',
            trigger: 'blur'
          }
        ]
      },
      // 修改表单验证规则对象
       ChangeFormRules: {
           attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
          {
            min: 2,
            max: 10,
            message: '名称长度2到10个字符之间',
            trigger: 'blur'
          }
        ]
       },
      // 修改对话框的显示与隐藏
      ChangeparameterVisible: false,
      // 修改对话框的数据
      ChangeForm: {
          // attrname: ''
      },
      // 控制按钮和文本框的显示和隐藏
      // inputVisible:false,
      // 文本框中输入的内容
      // inputVisible: ''
      
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取所有的商品分类列表
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      //   console.log(res);
      if (res.meta.status !== 200) {
        return $message.error('获取商品列表失败!')
      }
      this.Productclassificationlist = res.data
      //   console.log(this.Productclassificationlist);
    },
    // 级联选择框选中项变化,会触发这个函数
    handleChange() {
      this.getParamsData()
    },
    // tabs页签点击的函数
    handleTabClick() {
      // console.log(this.activeName);
      this.getParamsData()
    },
    // 获取参数的列表数据
    async getParamsData() {
      // console.log(this.selectedCatekeys)
      if (this.selectedCatekeys.length !== 3) {
        this.selectedCatekeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }

      // console.log(this.selectedCatekeys)
      // 根据所选分类的id 和当前所处的面板 获取对应的参数
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName }
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败!')
      }
       res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // 控制文本框的显示和隐藏
        item.inputVisible = false
        // 文本框中输入的值
        item.inputValue = ''
      })
      console.log(res.data)
     
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
      //监听添加参数对话框的关闭事件
    paramClosed () {
      this.$refs.paramRef.resetFields()
    },
    // 监听修改参数对话框的关闭事件
    ChangeFormClosed () {
      this.$refs.ChangeFormRef.resetFields()
    },
    // 点击添加参数
     addparams () {
        // 预验证当用户点击取消时
        this.$refs.paramRef.validate(async valid => {
            if (!valid) return 
            // 发送添加参数axios
            const {data: res} = await this.$http.post(`categories/${this.cateId}/attributes`,{
                attr_name:this.paramForm.attr_name,
                attr_sel: this.activeName
            })
            // console.log(res);
            if (res.meta.status !== 201) {
                return this.$message.error('添加参数失败!')
            }
            this.$message.success('添加参数成功!')
             // 关闭对话框
            this.parameterVisible = false
            this.getParamsData()


        })
    },
    // 点击删除参数
    async Deleteparameter (id) {
            // console.log(id);
            const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
                }).catch(err => err)
            // console.log(confirmResult);
            if(confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }
            // console.log('确认了删除');
            const {data: res} = await this.$http.delete(`categories/${this.cateId}/attributes/${id}`)
                console.log(res);
                
            if(res.meta.status !== 200) {
            return this.$message.error('删除用户失败!')
            }
            this.$message.success('删除用户成功')
            this.getParamsData()
    },
    // 点击修改参数
   async Changeparameters (id) {
    
        // console.log(id);
      const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes/${id}`,{
        params: {attr_sel: this.activeName}
      })
      //  console.log(res);
      this.ChangeForm= res.data
        // 显示对话框
      this.ChangeparameterVisible = true
    },
    // 点击确定修改
    Confirmmodification () {
            this.$refs.ChangeFormRef.validate(async valid => {
            if (!valid) return
            const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.ChangeForm.attr_id}`,{
            attr_name:this.ChangeForm.attr_name,
            attr_sel: this.activeName
            })
            // console.log(res);
            if (res.meta.status !== 200) {
              return this.$message.error('修改参数失败!')
            }
            this.$message.success('修改参数成功!')
            // 隐藏对话框
            this.ChangeparameterVisible = false
            this.getParamsData()
        })
           
      },
      // 失去焦点或 按下啦enter 触发
     async handleInputConfirm (row) {
        // console.log(11);
        if (row.inputValue.trim().length === 0) {
             row.inputVisible = false
             row.inputValue = ''
             return
        }
        row.attr_vals.push(row.inputValue.trim()
        )
        row.inputValue = ''
        row.inputVisible = false
      // 发起请求 保存这次操作
       this.saveAttrVals(row)
    },
  // 将对attr_vals的操作 保存到数据库
    async saveAttrVals (row) {
       // 发起请求 保存这次操作
      const {data: res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
          attr_name:row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(' ')
      }
    )
    
      if (res.meta.status !== 200) {
        return this.$message.error('更新失败!')
      }
      this.$message.success('更新成功!')
    },
      // 点击按钮 展示文本输入框
      showInput(row) {
        row.inputVisible = true
        // 自动获得焦点
        // $nextTick的作用就是当页面上的元素被重新渲染之后
        // 才会指定回调函数中的代码
         this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
      },
      // 删除参数可选项
      handleClose(i, row) {
        row.attr_vals.splice(i,1)
         this.saveAttrVals(row)
      }
  },
  // 计算属性
  computed: {
    // 如果按钮需要被禁用 则返回true否则返回false
    isBtnDisabled() {
      if (this.selectedCatekeys.length !== 3) {
        return true
      }
      return false
    },
    // 当前选中的三级分类id
    cateId() {
      if (this.selectedCatekeys.length === 3) {
        return this.selectedCatekeys[2]
      }
      return null
    },
    // 动态计算标题的文本
    titleText() {
      if (this.activeName == 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-cascader {
  margin-left: 10px
}
.input-new-tag {
  width: 120px;
}
</style>